1.) Do not rely on making your thank-you notes. Just order them. For serious, yo. Or make them right now. No, not next week. No, you don't have "plenty of time." This is something you must get done now, or you will run headfirst into crafting burnout and try to put off writing thank you notes because you don't have time to make them. Or you just don't want to make them.
2.) Don't write shower notes and then either lose them or not send them until after the wedding. Because then you will have written, "can't wait to see you next weekend" and it will have already passed. Then you will either be lame, lazy, or both.